Heating assembly and aerosol generating device

Abstract

The present invention provides a heating assembly and an aerosol generating device, the heating assembly including a substrate, an electric heating film layer provided on the surface of the substrate and including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the substrate, and a conductive element for simultaneously supplying power to the first electric heating film layer and the second electric heating film layer, wherein the resistance of the first electric heating film layer is different from the resistance of the second electric heating film layer, or the heating power of the first electric heating film layer is different from the heating power of the second electric heating film layer. In this invention, some electric heating film layers can be heated more quickly than other electric heating film layers, allowing some aerosol-forming substrates to reach a preheating temperature more quickly, shortening the preheating time of the aerosol-forming substrates and reducing the waiting time before inhalation, improving the user experience.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This invention claims priority to a Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on September 22, 2022, bearing application number 202211160685.7 and entitled "Heating Assembly and Aerosol Generating Device," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the field of electronic atomization, and more particularly to a heating assembly and an aerosol generating device. [Background technology]

[0003] Inhalation articles such as cigarettes and cigars burn tobacco leaves to produce vapor during use. Instead of these products that burn tobacco leaves, efforts have been made to create products that release compounds without burning tobacco leaves. So-called heat-not-burn products are one example of such products, which release compounds by heating tobacco leaves rather than burning them.

[0004] A problem that exists with conventional aerosol generating devices is the long pre-heating time of the aerosol-forming substrate, resulting in a poor user experience. Summary of the Invention

[0005] The present invention provides a heating assembly and an aerosol generating device that aims to solve the problems present in conventional aerosol generating devices, such as long warm-up times and poor user experience.

[0006] In one aspect of the present invention, a substrate; an electric heating film layer provided on the surface of the base, the electric heating film layer including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the base; a conductive element for simultaneously supplying power to the first and second electric heating film layers; The heating assembly may be provided such that the resistance of the first electric heating film layer is different from the resistance of the second electric heating film layer, or the heating power of the first electric heating film layer is different from the heating power of the second electric heating film layer.

[0007] In another embodiment of the present invention, a substrate; an electric heating film layer provided on the surface of the base, the electric heating film layer including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the base; a conductive element for simultaneously supplying power to the first and second electric heating film layers; A heating assembly is provided in which the axial extension length of the first electric heating film layer is the same as the axial extension length of the second electric heating film layer, and the circumferential extension length of the first electric heating film layer is different from the circumferential extension length of the second electric heating film layer.

[0008] In another embodiment of the present invention, a substrate; an electric heating film layer provided on the surface of the base, the electric heating film layer including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the base; a conductive element for simultaneously supplying power to the first and second electric heating film layers; The present invention further provides an aerosol generating device, wherein the second electrically heated membrane layer heats up at a faster rate than the first electrically heated membrane layer.

[0009] In another embodiment of the present invention, a substrate; an electric heating film layer provided on the surface of the base, the electric heating film layer including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the base; a conductive element for simultaneously supplying power to the first electric heating film layer and the second electric heating film layer, the conductive element including a first electrode and a second electrode, such that current can flow from the first electrode to the second electrode via the first electric heating film layer along a first circumferential direction of the substrate, and from the first electrode to the second electrode via the second electric heating film layer along a second circumferential direction opposite to the first circumferential direction; The present invention further provides an aerosol generating device in which the flow distance of the current in the first circumferential direction is different from the flow distance in the second circumferential direction, or the first electrode has a first circumferential distance between it and the second electrode in the first circumferential direction and the first electrode has a second circumferential distance between it and the second electrode in the second circumferential direction, and the first circumferential distance is different from the second circumferential distance.

[0010] In another embodiment of the present invention, a housing assembly; a heating assembly disposed within the housing assembly; a battery cell for providing power; and a circuit configured to acquire temperature information of the second electrically heated membrane layer and control the battery cell to provide power to the first electrically heated membrane layer and the second electrically heated membrane layer based on the temperature information of the second electrically heated membrane layer.

[0011] In the heating assembly and aerosol generating device provided by the present invention, the resistance or heating power of each electric heating film layer is different, so that some electric heating film layers can heat up faster than other electric heating film layers, and some aerosol-forming substrates can reach the preheating temperature more quickly, thereby shortening the preheating time of the aerosol-forming substrates and reducing the waiting time before inhalation, thereby improving the user experience. [Brief explanation of the drawings]

[0012] One or more embodiments are illustrated by way of example only and not by way of limitation in the accompanying drawings, in which like reference numerals designate similar elements and the drawings are not to scale unless otherwise specified. [Figure 1] 1 is a schematic diagram of an aerosol generating device provided in an embodiment of the present invention. [Figure 2] 1 is an exploded schematic view of an aerosol generating device provided in an embodiment of the present invention. FIG. [Figure 3] 1 is a schematic diagram of a heating assembly provided in an embodiment of the present invention. [Figure 4] 1 is an exploded schematic view of a heating assembly provided in an embodiment of the present invention. [Figure 5] 1 is a schematic diagram of a heater in a heating assembly provided in an embodiment of the present invention. [Figure 6] 1 is a schematic top view of a heater provided in an embodiment of the present invention. FIG. [Figure 7] FIG. 2 is a schematic diagram of another heating assembly provided in accordance with an embodiment of the present invention. [Figure 8] FIG. 2 is an exploded schematic view of another heating assembly provided in an embodiment of the present invention. [Figure 9] FIG. 2 is a schematic diagram of a heater in another heating assembly provided in an embodiment of the present invention. [Figure 10] FIG. 10 is a schematic diagram of an electrode connection member in another heating assembly provided in an embodiment of the present invention. [Figure 11] FIG. 10 is a schematic top view of yet another heater provided in an embodiment of the present invention. [Figure 12] FIG. 10 is a schematic diagram of yet another heater provided in accordance with an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] To facilitate understanding of the present invention, the present invention will be described in more detail below in connection with the drawings and specific embodiments. It should be noted that when an element is described as being "fixed" to another element, it may be directly located on the other element, or there may be one or more intervening elements therebetween. When an element is described as being "connected" to another element, it may be directly connected to the other element, or there may be one or more intervening elements therebetween. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used herein are for descriptive purposes only.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0015] 1 and 2 show an aerosol generating device 100 provided in an embodiment of the present invention, which includes a housing assembly 6 and a heater provided within the housing assembly 6.

[0016] The housing assembly 6 includes an outer housing 61, a fixed housing 62, a base, and a bottom cover 64, and both the fixed housing 62 and the base are fixed within the outer housing 61. The base is for fixing the base body 111 and is provided within the fixed housing 62, and the bottom cover 64 is provided at one end of the outer housing 61 to seal the outer housing 61.

[0017] Specifically, the base is made up of base 15, which fits onto the proximal end of base body 111, and base 13, which fits onto the distal end of base body 111; both base 15 and base 13 are provided within fixed housing 62; an intake pipe 641 is protruded from bottom cover 64; one end of base 13 opposite base 15 is connected to intake pipe 641. Base 15, base 111, base 13, and intake pipe 641 are arranged coaxially; the spaces between base 111 and base 15 and base 13 are sealed by sealing members; the base 13 and intake pipe 641 are also sealed; and intake pipe 641 communicates with the outside air to allow smooth inhalation when the user inhales.

[0018] The aerosol generating device 100 further includes a circuit 3 and a battery cell 7. The fixed housing 62 includes a front housing 621 and a back housing 622 that are fixedly connected to each other. The circuit 3 and the battery cell 7 are both housed within the fixed housing 62. The battery cell 7 is electrically connected to the circuit 3. A button 4 is protruded from the outer housing 61. Pressing the button 4 can supply or cut off power to the electric heating film layer, such as a resistive heating film layer or an infrared electric heating coating, on the surface of the base 111. A charging port 31 exposed on the bottom cover 64 is further connected to the circuit 3. The charging port 31 allows users to charge or update the aerosol generating device 100, ensuring continuous use of the aerosol generating device 100.

[0019] The aerosol generating device 100 further includes a thermal insulation pipe 17 provided within the fixed housing 62. The thermal insulation pipe 17 is provided around the outer periphery of the base 111, thereby preventing hands from burning due to excessive heat transfer to the outer housing 61. The thermal insulation pipe includes a thermal insulation material, which may be insulating rubber, aerogel, aerogel felt, asbestos, aluminum silicate, calcium silicate, diatomaceous earth, zirconium oxide, or the like. The thermal insulation pipe 17 may also be a vacuum thermal insulation pipe. An infrared reflective coating may be further formed within the thermal insulation pipe 17 to reflect infrared rays radiated from the infrared electric heating coating on the base 111 back to the base 111, thereby improving heating efficiency.

[0020] The aerosol generating device 100 further includes a temperature sensor 2, such as an NTC thermistor, a PTC thermistor, or a thermocouple, for detecting the real-time temperature of the substrate 111 and transmitting it to a circuit 3. The circuit 3 adjusts the magnitude of the current flowing through the infrared electrothermal coating based on the real-time temperature.

[0021] 3 to 6 show a heating assembly provided in an embodiment of the present invention, and the heating assembly 10 includes a heater 11, an electrode connecting member 12, a temperature sensor 2, and a holding member 14. The heater 11 is It includes a base 111 having a cavity formed therein suitable for receiving an aerosol-forming substrate.

[0022] Specifically, the substrate 111 includes a proximal end, a distal end, and a surface extending between the proximal and distal ends. The substrate 111 is hollow, forming a cavity suitable for accommodating an aerosol-forming product. The substrate 111 may be tubular, for example, cylindrical, prism-like, or other cylindrical. The substrate 111 is preferably cylindrical, and the cavity is a cylindrical hole penetrating the center of the substrate 111. The inner diameter of the hole is slightly larger than the outer diameter of the aerosol-forming product so as to facilitate heating the aerosol-forming product within the cavity. The inner diameter of the substrate 111 is 6 mm to 15 mm, or 7 mm to 15 mm, or 7 mm to 14 mm, or 7 mm to 12 mm, or 7 mm to 10 mm. The axial extension length of the base 111 is 15 mm to 25 mm, or 16 mm to 25 mm, or 18 mm to 25 mm, or 18 mm to 24 mm, or 18 mm to 22 mm.

[0023] The base 111 may be made of a material that is resistant to high temperatures and is infrared-transmissive, such as quartz glass, ceramics, or mica, or may be made of another material that has high infrared transmittance, for example, a high-temperature resistant material with an infrared transmittance of 95% or more, and is not specifically limited here.

[0024] An aerosol-forming substrate is a substrate capable of releasing a volatile compound capable of forming an aerosol. Such a volatile compound can be released by heating the aerosol-forming substrate. The aerosol-forming substrate may be solid, liquid, or comprise both solid and liquid components. The aerosol-forming substrate may be attached to a carrier or support by adsorption, coating, immersion, or other methods. The aerosol-forming substrate may conveniently be part of the aerosol-generating product.

[0025] The aerosol-forming substrate may contain nicotine. The aerosol-forming substrate may also contain tobacco, for example, a tobacco-containing material containing volatile compounds having a tobacco-like odor, which are released from the aerosol-forming substrate upon heating. Preferably, the aerosol-forming substrate may contain a homogeneous tobacco material, such as deciduous tobacco. The aerosol-forming substrate may also contain at least one aerosol-forming agent, which may be any suitable known compound or mixture of compounds that, during use, contributes to the formation of a dense and stable aerosol and is essentially resistant to thermal decomposition at the operating temperature of the aerosol-generating system. Suitable aerosol-forming agents are well known in the art and include, but are not limited to, polyols such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols such as glyceryl monoacetate, glyceryl diacetate, or glyceryl triacetate; and fatty acid esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferably, the aerosol forming agent is a polyhydroxy alcohol or mixtures thereof, such as triethylene glycol, 1,3-butanediol, and most preferably, propanetriol.

[0026] The infrared electric thermal coating 112 is formed on the surface of the substrate 111. The infrared electric thermal coating 112 may be formed on the outer surface of the substrate 111 or on the inner surface of the substrate 111.

[0027] In this example, the infrared electric thermal coating 112 is formed on the outer surface of the base 111. The infrared electric thermal coating 112 generates heat when power is received, and also generates infrared rays of a certain wavelength, for example, far infrared rays of 8 μm to 15 μm. When the wavelength of the infrared rays matches the absorption wavelength of the aerosol-forming substrate, the infrared energy is easily absorbed by the aerosol-forming substrate.

[0028] The infrared electric heating coating 112 is preferably formed by thoroughly and uniformly mixing far-infrared electric heating ink, ceramic powder, and inorganic adhesive, applying the mixture to the outer surface of the substrate 111, and then baking and curing for a predetermined time, and the thickness of the infrared electric heating coating 112 is 30 μm to 50 μm. Of course, the infrared electric heating coating 112 may be formed by mixing and stirring tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride, and anhydrous copper sulfate in a predetermined ratio, and then applying the mixture to the outer surface of the substrate 111. Alternatively ... or by coating a silicon carbide ceramic layer, a carbon fiber composite layer, a zircon The infrared electric heating coating 112 may be one of a ceramic layer, an iron-based carbide ceramic layer, a rare earth-based oxide ceramic layer, a rare earth-based nitride ceramic layer, a rare earth-based boride ceramic layer, a rare earth-based carbide ceramic layer, a nickel-cobalt-based oxide ceramic layer, a nickel-cobalt-based nitride ceramic layer, a nickel-cobalt-based boride ceramic layer, a nickel-cobalt-based carbide ceramic layer, or a high-silica molecular sieve ceramic layer, and the infrared electric heating coating 112 may also be other conventional material coatings.

[0029] The conductive element includes an electrode 113 and an electrode 114 spaced apart from each other on the substrate 111 and is used to supply the power provided by the battery cell 7 to the infrared electrothermal coating 112 .

[0030] Both the electrode 113 and the electrode 114 are in contact with and electrically connected to the infrared electrothermal coating 112. The electrode 113 and the electrode 114 may be a conductive coating, which may be a metal coating, and the metal coating may include silver, gold, palladium, platinum, copper, nickel, molybdenum, tungsten, niobium, or an alloy material of the above metals.

[0031] Both electrodes 113 and 114 extend along the axial direction of substrate 111 and are elongated. The axial extension lengths of electrodes 113 and 114 are the same as the axial extension length of infrared electric thermal coating 112. The circumferential extension length or width of electrodes 113 and 114 is 0.2 mm to 5 mm, preferably 0.2 mm to 4 mm, more preferably 0.2 mm to 3 mm, even more preferably 0.2 mm to 2 mm, and even more preferably 0.5 mm to 2 mm. In this way, electrodes 113 and 114 divide infrared electric thermal coating 112 into two infrared electric thermal coatings, i.e., a first infrared electric thermal coating and a second infrared electric thermal coating, along the circumferential direction of substrate 111. The two partitioned infrared electric heating coatings are distributed along the circumferential direction of the substrate 111 and connected in parallel between the electrodes 113 and 114, which simultaneously supply power provided by the battery cell 7 to the first infrared electric heating coating and the second infrared electric heating coating. After the electrodes 113 and 114 are energized, current can flow from one electrode to the other electrode via the first infrared electric heating coating approximately along one circumferential direction of the substrate 111, and simultaneously, the current can flow from one electrode to the other electrode via the second infrared electric heating coating approximately along another circumferential direction of the substrate 111 (the direction opposite to the one circumferential direction).

[0032] In one example, electrode 113 has a first circumferential distance d1 between it and electrode 114 in a first circumferential direction of the substrate 111, e.g., the clockwise direction in FIG. 6 , and the infrared electrothermal coating between electrode 113 and electrode 114 is a first infrared electrothermal coating. Electrode 113 has a second circumferential distance d2 between it and electrode 114 in a second circumferential direction opposite to the first circumferential direction, e.g., the counterclockwise direction in FIG. 6 , and the infrared electrothermal coating between electrode 113 and electrode 114 is a second infrared electrothermal coating. The first circumferential distance d1 and the second circumferential distance d2 are different. When the circumferential extension length of the first infrared electrothermal coating is d1 and the circumferential extension length of the second infrared electrothermal coating are the same, the current flow distance in the first circumferential direction and the current flow distance in the second circumferential direction are also different. When the thickness of the infrared electric thermal coating is uniform, the resistance value of the first infrared electric thermal coating is greater than the resistance value of the second infrared electric thermal coating, that is, the resistance values ​​of two adjacent infrared electric thermal coatings in the circumferential direction of the substrate 111 are different.

[0033] When the electrodes 113 and 114 are energized, the heating power of the first infrared electric heating coating is smaller than the heating power of the second infrared electric heating coating, i.e., the heating power of two adjacent infrared electric heating coatings in the circumferential direction of the substrate 111 is different. The heating rate of the second infrared electric heating coating is faster than that of the first infrared electric heating coating. Therefore, the temperature of the aerosol-forming substrate corresponding to the second infrared electric heating coating rises more quickly than the temperature of the aerosol-forming substrate corresponding to the first infrared electric heating coating, allowing for the generation of inhalable aerosol. This shortens the pre-heating time of the aerosol-forming substrate and reduces the waiting time before inhalation.

[0034] The following method can be used to verify that the heating rate of the second infrared electric heating coating is faster than that of the first infrared electric heating coating. The same predetermined temperature is set. When the heating temperature of the second infrared electric heating coating reaches the predetermined temperature from an initial temperature (e.g., ambient temperature), if the heating temperature of the first infrared electric heating coating is lower than the predetermined temperature, it indicates that the heating rate of the second infrared electric heating coating is faster than that of the first infrared electric heating coating. The predetermined temperature may be the maximum temperature of the aerosol-generating device 100 or the operating temperature, i.e., the temperature at which aerosol can be generated on the aerosol-forming substrate.

[0035] Due to the different heating rates, the temperature difference between the second infrared electric heating coating and the first infrared electric heating coating is large during the pre-heating stage of the aerosol-generating device 100, but the temperature difference between the second infrared electric heating coating and the first infrared electric heating coating is relatively small during the warming stage or suction stage of the aerosol-generating device 100. The pre-heating stage, warming stage, and suction stage are different consecutive time periods in the curve of the temperature change of the aerosol-forming product or the infrared electric heating coating over time.

[0036] In a preferred embodiment, the first circumferential distance d1 is 1.5 to 6 times, or 2 times, 4 times, etc., the second circumferential distance d2. For example, if the first circumferential distance d1 is twice the second circumferential distance d2, the resistance value of one infrared electric thermal coating is twice the resistance value of the other infrared electric thermal coating (assuming the thickness of the infrared electric thermal coating is uniform).

[0037] It should be noted that in the above example, the reason the resistance value of the first infrared electric thermal coating is greater than that of the second infrared electric thermal coating is due to the difference in the circumferential extension lengths of the infrared electric thermal coatings. According to the resistance calculation formula R = ρL / S, when the resistivity ρ is constant and S is also constant, a larger L corresponds to a larger resistance value (since the second infrared electric thermal coating's L is large, its resistance value is also large). In another example, this may be due to the fact that the circumferential extension lengths of the infrared electric thermal coatings are the same but the axial extension lengths of the infrared electric thermal coatings are different. When the resistivity ρ is constant and L is also constant, a smaller S corresponds to a larger resistance value (S = axial extension length of infrared electric thermal coating * thickness of infrared electric thermal coating). Alternatively, this may be due to the fact that the circumferential extension lengths of the infrared electric thermal coatings are different and the axial extension lengths of the infrared electric thermal coatings are different.

[0038] In one example, a gap may be provided between the infrared electric heating coating 112 and the proximal or distal end of the substrate 111. For example, in FIG. 5, neither the B1 nor B2 portions of the outer surface of the substrate 111 are provided with an electrode or infrared electric heating coating 112, and the axial extension lengths of the B1 and B2 portions may be minimized. Generally, the axial extension lengths of the B1 and B2 portions are 0 to 1 mm, i.e., greater than 0 mm and equal to or less than 1 mm. Specific examples may be 0.2 mm, 0.4 mm, 0.5 mm, 0.7 mm, etc.

[0039] In one example, there may be no gap between the infrared electric heating coating 112 and the proximal or distal end of the substrate 111, i.e., the axial extension length of the electrode or the infrared electric heating coating 112 may be the same as the axial extension length of the substrate 111. In this way, the application area of ​​the infrared electric heating coating 112 can be increased and heat loss can be avoided.

[0040] The electrode connection members 12 contact and are electrically connected to the conductive elements. The number of electrode connection members 12 matches the number of conductive elements; that is, each electrode 113 has a corresponding electrode connection member 12, and each electrode 114 has a corresponding electrode connection member 12. The electrode connection members 12 can be electrically connected to the battery cells 7 via conductors; for example, one end of the conductor is welded to the electrode connection member 12, and the other end of the conductor is electrically connected to the battery cells 7 (the conductors may be electrically connected to the battery cells 7 via the circuit board 3, or may be electrically connected to the battery cells 7 directly). The electrode connection members 12 are preferably made of copper, copper alloy, aluminum, or aluminum alloy materials with excellent conductivity, and the surfaces are plated with silver or gold to reduce contact resistance and improve the welding performance of the material surface.

[0041] Like the conductive elements, the electrode connection member 12 is elongated and extends along the axial direction of the base 111. The axial extension length of the electrode connection member 12 may be the same as the axial extension length of the conductive elements. The circumferential extension length or width of the electrode connection member 12 is 0.2 mm to 5 mm, preferably 0.2 mm to 4 mm, more preferably 0.2 mm to 3 mm, even more preferably 0.2 mm to 2 mm, and even more preferably 0.5 mm to 2 mm. The thickness of the electrode connection member 12 is 0.05 mm to 1 mm, i.e., it may be thin. In specific examples, the thickness of the electrode connection member 12 may be 0.1 mm, 0.2 mm, 0.4 mm, 0.5 mm, etc. In a preferred embodiment, the axial extension length of the electrode connection member 12 is greater than the axial extension length of the conductive element but less than the sum of the axial extension length of the conductive element and the axial extension length of the B2 portion, or the axial extension length of the electrode connection member 12 is greater than the sum of the axial extension length of the conductive element and the axial extension length of the B2 portion, i.e., the upper end of the electrode connection member 12 is aligned with the upper end of the infrared electric heating coating 112 but the lower end of the electrode connection member 12 extends beyond the distal end of the base 111, thus contributing to welding of the conductive wire to the electrode connection member 12. In a more preferred embodiment, the distance between the lower end of the electrode connection member 12 and the distal end of the base 111 is 1 mm to 10 mm, preferably 1 mm to 8 mm, more preferably 1 mm to 6 mm, and even more preferably 1 mm to 4 mm.

[0042] The outer surface of the substrate 111 has a mark A at a predetermined position, allowing the user to assemble or position the temperature sensor 2 at the predetermined position based on the mark A. The mark A can be formed by applying a pigment at the predetermined position using a method such as printing or spray painting. In a preferred embodiment, the mark A is located between the electrodes 113 and 114 in the direction opposite to the first circumferential direction, i.e., in the area where the second infrared-thermal coating is present, i.e., the area where the infrared-thermal coating has a low resistance or high heating power. Generally, the mark A is located near the center point. In this way, the temperature sensor 2 can obtain temperature information of the second infrared-thermal coating, allowing the circuit 3 to control the battery cell 7 to provide power to the first infrared-thermal coating and the second infrared-thermal coating.

[0043] The holding member 14 is used to hold the electrode connection member 12 to the electrodes 113 and 114 and to hold the temperature sensor 2 at mark A. The holding member 14 includes high-temperature resistant tape or heat-shrink tubing. In actual application, high-temperature resistant tape can be wrapped directly around the electrode connection member 12 and the temperature sensor 2, or a heat-shrink tubing can be fitted over the electrode connection member 12 and the temperature sensor 2 and then heated to shrink and fasten the electrode connection member 12 and the temperature sensor 2. In a preferred embodiment, a portion of the electrode connection member 12 is exposed to the holding member 14, which facilitates welding of the conductive wire to the electrode connection member 12.

[0044] 7 to 10 show another heating assembly provided in another embodiment of the present invention, which differs from the example of FIGS. 3 to 6 in the following respects.

[0045] The conductive element further includes electrodes 115 and 116 extending along the circumferential direction of the substrate 111. Electrode 115 is connected to electrode 113, and electrode 116 is connected to electrode 114. In practice, electrodes 115 and 113, and electrodes 116 and 114 may be integrated. A gap may be provided between each of electrodes 115 and 116 and the infrared electrothermal coating 112. For example, a relatively wide B2 portion on the outer surface of the substrate 111 may be provided. Alternatively, electrodes 115 and 116 may all be provided on the B2 portion on the outer surface of the substrate 111, i.e., on the same end of the substrate 111. Of course, electrodes 115 and 116 may also be provided on the B1 portion on the outer surface of the substrate 111, or may be provided on different ends of the substrate 111.

[0046] 7 to 10, the electrode connecting member 12 includes a contact portion and an extending portion 123. The contact portion includes a main body 121 and one or more cantilevers 122 formed by openwork on the main body 121, and the multiple cantilevers 122 are distributed at intervals along the circumferential direction of the base 111. When the cantilever 122 comes into contact with the electrode 115 or the electrode 116, it generates an elastic force, thereby achieving electrical connection with the electrode 115 or the electrode 116. The extending portion 123 extends from the main body 121 to a position away from the base 111.

[0047] FIG. 11 shows a heater provided in yet another embodiment of the present invention, which differs from the examples shown in FIGS. 3 to 6 in the following respects.

[0048] Electrode 114 includes electrode 1141 and electrode 1142, and electrode 113 has a first circumferential distance d1 between electrode 1141 and electrode 113 in a first circumferential direction of substrate 111, for example, the counterclockwise direction in FIG. 11, and has a second circumferential distance d2 between electrode 113 and electrode 1142 in a direction opposite to the first circumferential direction, for example, the clockwise direction in FIG. 11, and first circumferential distance d1 and second circumferential distance d2 are different.

[0049] In this example, the infrared electrothermal coating 112 includes a first infrared electrothermal coating positioned between the electrode 113 and the electrode 1141 and a second infrared electrothermal coating positioned between the electrode 113 and the electrode 1142 .

[0050] As described above, the resistance of the second infrared electric heating coating is smaller than the resistance of the first infrared electric heating coating, the heating power of the second infrared electric heating coating is larger than the heating power of the first infrared electric heating coating, and the heating rate of the second infrared electric heating coating is faster than the heating rate of the first infrared electric heating coating.

[0051] It should be noted that although three electrodes are used as an example in FIG. 11, in other examples four or more electrodes may be used as well.

[0052] FIG. 12 shows a heater provided in yet another embodiment of the present invention, which differs from the example shown in FIGS. 3 to 6 in the following respects.

[0053] The B3 portion on the outer surface of the substrate 111 divides the infrared electric heating coating 112 into two independently controllable heating regions, i.e., the infrared electric heating coating 1121 and the infrared electric heating coating 1122, and the axial extension length of the B3 portion may be as small as possible, for example, 0.4 mm to 1 mm, preferably 0.4 mm to 0.8 mm, and more preferably 0.5 mm.

[0054] The electrodes further include electrode 115 spaced apart from the substrate 111, i.e., electrode 113, electrode 114, and electrode 115 are isolated from each other. Electrode 115 is in contact with and electrically connected to both infrared electrothermal coating 1121 and infrared electrothermal coating 1122, electrode 113 is in contact with and electrically connected to infrared electrothermal coating 1121, and electrode 114 is in contact with and electrically connected to infrared electrothermal coating 1122.

[0055] In this way, by controlling the current passing through electrode 113, electrode 114, and electrode 115, it is possible to realize stepwise heating of the aerosol-forming substrate, for example, by activating infrared electric heating coating 1121 to heat it (by controlling electrodes 113 and 115 to pass current), and then activating infrared electric heating coating 1122 to heat it (by controlling electrodes 114 and 115 to pass current). Alternatively, by activating infrared electric heating coating 1121 to heat it (by controlling electrodes 113 and 115 to pass current), and then activating infrared electric heating coating 1121 and infrared electric heating coating 1122 to heat it together (by controlling electrodes 113, 114, and 115 to pass current together).

[0056] As before, electrodes 113 and 115 divide infrared electric thermal coating 1121 into two infrared electric thermal coatings along the circumferential direction of substrate 111. Of the two divided infrared electric thermal coatings, one has a lower resistance than the other, and after electrodes 113 and 115 are energized, the heating power of one infrared electric thermal coating is greater than the heating power of the other. Therefore, the heating rate of one infrared electric thermal coating is faster than the heating rate of the other.

[0057] It should be noted that although the specification and drawings of the present invention show preferred embodiments of the present invention, the present invention can be realized in many different forms and is not limited to the embodiments described herein, and these embodiments do not further limit the content of the present invention. The purpose of providing these embodiments is to make the disclosure of the present invention more complete and comprehensive. In addition, various embodiments not listed above that are formed by further combining the above technical features are also within the scope of the present specification. Furthermore, those skilled in the art may make improvements or modifications based on the above description, and all of these improvements and modifications are intended to fall within the scope of protection of the appended claims of the present invention.

Claims

1. a substrate; an electric heating film layer provided on the surface of the base, the electric heating film layer including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the base; a conductive element for simultaneously supplying power to the first and second electric heating film layers; A heating assembly, characterized in that the resistance of the first electric heating film layer is different from the resistance of the second electric heating film layer, or the heating power of the first electric heating film layer is different from the heating power of the second electric heating film layer.

2. 2. The heating assembly of claim 1, wherein the tubular substrate has an inner diameter of 6 mm to 15 mm and / or an axial extension length of 15 mm to 25 mm.

3. 2. The heating assembly of claim 1, wherein the electric heating film layer includes an infrared electric heating coating for generating heat and infrared radiation upon receiving electrical power.

4. 2. The heating assembly of claim 1, wherein the axial extension of the first or second electric heating film layer is equal to or less than the axial extension of the substrate.

5. The heating assembly of claim 1 , wherein the first electric heating film layer has a circumferential extension length different from the circumferential extension length of the second electric heating film layer.

6. 2. The heating assembly of claim 1, wherein the conductive element includes a first electrode and a second electrode, such that current can flow from the first electrode through the first electric heating film layer to the second electrode along a first circumferential direction of the substrate, and from the first electrode through the second electric heating film layer to the second electrode along a second circumferential direction opposite to the first circumferential direction.

7. 7. The heating assembly of claim 6, wherein the first electrode and the second electrode both extend along the axial direction of the substrate.

8. 7. The heating assembly of claim 6, wherein a distance between the first electrode and the second electrode in the first circumferential direction is different from a distance between the first electrode and the second electrode in the second circumferential direction.

9. 9. The heating assembly of claim 8, wherein the distance between the first electrode and the second electrode in the first circumferential direction is 1.5 to 6 times the distance between the first electrode and the second electrode in the second circumferential direction.

10. the conductive element further includes a third electrode; 7. The heating assembly of claim 6, wherein current can flow from the first electrode through the first electric heating film layer to the second electrode along a first circumferential direction of the substrate, and from the first electrode through the second electric heating film layer to the third electrode along a second circumferential direction opposite to the first circumferential direction.

11. 2. The heating assembly of claim 1, further comprising a temperature sensor for detecting the temperature of the electric heating film layer having a lower resistance or a higher heating power among the first electric heating film layer and the second electric heating film layer.

12. a substrate; an electric heating film layer provided on the surface of the base, the electric heating film layer including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the base; a conductive element for simultaneously supplying power to the first and second electric heating film layers; A heating assembly characterized in that the axial extension length of the first electric heating film layer and the axial extension length of the second electric heating film layer are the same, and the circumferential extension length of the first electric heating film layer and the circumferential extension length of the second electric heating film layer are different.

13. a substrate; an electric heating film layer provided on the surface of the base, the electric heating film layer including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the base; a conductive element for simultaneously supplying power to the first and second electric heating film layers; A heating assembly, wherein the second electrically heated film layer heats up at a faster rate than the first electrically heated film layer.

14. a substrate; an electric heating film layer provided on the surface of the base, the electric heating film layer including a first electric heating film layer and a second electric heating film layer distributed along the circumferential direction of the base; a conductive element for simultaneously supplying power to the first electric heating film layer and the second electric heating film layer, the conductive element including a first electrode and a second electrode, such that current can flow from the first electrode to the second electrode via the first electric heating film layer along a first circumferential direction of the substrate, and from the first electrode to the second electrode via the second electric heating film layer along a second circumferential direction opposite to the first circumferential direction; a flow distance of the current in the first circumferential direction is different from a flow distance in the second circumferential direction, or the first electrode has a first circumferential distance between it and the second electrode in the first circumferential direction and the first electrode has a second circumferential distance between it and the second electrode in the second circumferential direction, and the first circumferential distance is different from the second circumferential distance.

15. a housing assembly; a heating assembly according to any one of claims 1 to 14 provided within the housing assembly; and a battery cell for providing power; and a circuit configured to acquire temperature information of the second electric heating film layer and control the battery cell to provide power to the first electric heating film layer and the second electric heating film layer based on the temperature information of the second electric heating film layer.

Images